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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: RE: Shared PP CCS enforces class A operation... posted by wheezer on December 4, 2010 at 09:42:00:
Good question. I'm not an expert, but I think it depends a lot on the specific tube type and circuit. When triode connected, some pentodes may tolerate significant grid current without damage or excessive distortion; I seem to recall hearing that this is especially true of some 6L6 equivalents. This might still hold to some extent in ultralinear operation. In straight pentode operation, I would think the tube could hardly go into A2 or AB2 at all, because the Vg1 = 0 curve is already almost at zero plate voltage. I think there were some old Macintosh amps that were designed to go into AB2, but their OPTs had those special cathode windings, so again that was not exactly standard pentode operation.
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- RE: Shared PP CCS enforces class A operation... - JJ Triode 10:10:10 12/07/10 (0)
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